17 Feb
2012
17 Feb
'12
2:09 p.m.
Hi Daniel,
no, in order to find the best match we do a manual trick using
the s.prefixes transformation (I think you suggested that). We start with
the full number and stop when we find a non-null value. This kamailio is
serving many thousands of calls per hour, and the response time is pretty
much the same as when we used the mtree module. For us , using redis has
the advantage of being able to load the tree data faster than when we used
postgres without the need to perform a mtree reload.
Regards
Javi
On Fri, Feb 17, 2012 at 10:25 AM, Daniel-Constantin Mierla <
miconda(a)gmail.com> wrote:
Hello Javier,
one question about redis, can it do longest prefix matching or all
prefixes match?
Cheers,
Daniel
On 2/16/12 2:51 PM, Javier Gallart wrote:
Hello Uri
I had similar needs and I found the ndb_redis module more suited for
that type of task. Instead of a tree you have a hash like this: tname
tprefix tvalue. If you do a hget nts $avp(DID) and you get a not null
value you have found your exact match. It works very well for me and the
time it takes for that "query" is barely noticeable. Of course redis does
not address items like persistence, etc the same way a rdbms does.
Hope it helps.
Regards
Javi
On Thu, Feb 16, 2012 at 12:00 PM, <sr-users-request(a)lists.sip-router.org>wrote;wrote:
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> 1. how to match exact string value in mtree (Uri Shacked)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 16 Feb 2012 12:54:50 +0200
> From: Uri Shacked <ushacked(a)gmail.com>
> Subject: [SR-Users] how to match exact string value in mtree
> To: "SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) -
> Users Mailing List" <sr-users(a)lists.sip-router.org>
> Message-ID:
> <CAMMbDhTFNXAE-K88=
> AeMjO7AnA_QJV3Ajj3AH-AxemXN3ze6HQ(a)mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi,
>
> I am using Mtree to match prefix numbers, some of them starts with 0 or
> characters like D for example.
> so, the mtree param is like this:
>
> modparam("mtree", "db_url", CFGDB)
> modparam("mtree", "mtree",
> "name=nts;dbtable=service_numbers_view;type=0;")
> modpmodparam("mtree", "char_list",
"0123456789*+#YMDabcdefgh")
> modparam("mtree", "pv_value", "$avp(mtval)")
> modparam("mtree", "pv_values", "$avp(mtvals)")
>
> The thing is, that i tried all:
>
> if(!mt_match("nts", "$avp(DID)","1"))
> if(!mt_match("nts", "$avp(DID)","2"))
> if(!mt_match("nts", "$avp(DID)","0"))
>
> and lets say i have the both prefix in the nts mtree:
> 09555
> 09555333
>
> And the prefix i search for is $avp(DID)=09555444
>
> I allwasy get the 09555 because it is the longest match.
> I need exact match.....
>
> how do i do that?
>